申请人:JX Nippon Oil & Energy Corporation
公开号:EP2535397A1
公开(公告)日:2012-12-19
The present invention provides an additive composition for a lubricating oil that comprises a metal salt of a phosphorus-containing compound, is easy to produce, does not have adverse effects such as causing rubber seals to swell, and is excellent in storage stability. The additive composition comprises a metal salt of a phosphorus-containing compound represented by formula (1) in an amount of 10 to 90 percent by mass on the basis of the composition, contained in a hydrocarbon solvent selected from a mineral oil, a hydrocarbon synthetic oil and a mixture thereof, the hydrocarbon solvent having a 100°C kinematic viscosity of 0.5 to 4.5 mm2/s, a %CA of 3 or less, and a sulfur content of 0.05 percent by mass or less:
wherein X1 and X2 are each independently oxygen or sulfur, R1, R2, R3, and R4 are each independently a straight-chain alkyl group having 3 to 12 carbon atoms, the average of the carbon number is 5 or greater, and M is a divalent metal atom.
本发明提供了一种用于润滑油的添加剂组合物,该组合物包含一种含磷化合物的金属盐,易于生产,不会产生诸如导致橡胶密封件膨胀等不利影响,并且具有优异的储存稳定性。该添加剂组合物包含一种由式(1)表示的含磷化合物的金属盐,其含量为组合物质量的 10% 至 90%,该金属盐包含在一种烃类溶剂中,该烃类溶剂选自矿物油、烃类合成油及其混合物,该烃类溶剂的 100°C 运动粘度为 0.5 至 4.5 mm2/s,%CA 为 3 或更低,硫含量为 0.05% 或更低:
其中 X1 和 X2 各自独立地为氧或硫,R1、R2、R3 和 R4 各自独立地为具有 3 至 12 个碳原子的直链烷基,碳原子数的平均值为 5 或更大,M 为二价金属原子。